An Imprint of Superstructures on the Microwave Background due to the Integrated Sachs-Wolfe Effect

We measure hot and cold spots on the microwave background associated with supercluster and supervoid structures identified in the Sloan Digital Sky Survey luminous red galaxy catalog. The structures give a compelling visual imprint, with a mean temperature deviation of 9.6 +/- 2.2 [mu]K, i.e., above...

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Bibliographic Details
Published inThe Astrophysical journal Vol. 683; no. 2; pp. L99 - L102
Main Authors Granett, Benjamin R, Neyrinck, Mark C, Szapudi, István
Format Journal Article
LanguageEnglish
Published Chicago, IL IOP Publishing 20.08.2008
University of Chicago Press
Subjects
Astronomy
Earth, ocean, space
Exact sciences and technology
Statistical method
large-scale structure of universe-methods: statistical
Cosmic background radiation
Cosmology
cosmic microwave background-cosmology: observations
Sachs Wolfe effect
Large-scale structure
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Summary:We measure hot and cold spots on the microwave background associated with supercluster and supervoid structures identified in the Sloan Digital Sky Survey luminous red galaxy catalog. The structures give a compelling visual imprint, with a mean temperature deviation of 9.6 +/- 2.2 [mu]K, i.e., above 4 capital sigma . We interpret this as a detection of the late-time integrated Sachs-Wolfe (ISW) effect, in which cosmic acceleration from dark energy causes gravitational potentials to decay, heating or cooling photons passing through density crests or troughs. In a flat universe, the linear ISW effect is a direct signal of dark energy.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:1538-4357
0004-637X
1538-4357
DOI:10.1086/591670